This does nothing. getRouterContext() is always null when onActivityResult() is
called. Todo: implement callback that fires when the Router has bound and the
Fragment has an Activity.

Broken, addresses do not load into mAdapter after a tab change.

The onPause() method in SettingsFragment was removed as it is unnecessary. The
parent SettingsActivity onPause() is sufficient to save config changes.

TODO: Refresh summary when a setting is changed.